BaseTools: Copy Brotli algorithm 3rd party source code for tool

[mirror_edk2.git] / BaseTools / Source / C / BrotliCompress / enc / streams.h

diff --git a/BaseTools/Source/C/BrotliCompress/enc/streams.h b/BaseTools/Source/C/BrotliCompress/enc/streams.h
new file mode 100644 (file)
index 0000000..010a5be
--- /dev/null
+++ b/BaseTools/Source/C/BrotliCompress/enc/streams.h
@@ -0,0 +1,121 @@
+/* Copyright 2009 Google Inc. All Rights Reserved.\r
+\r
+   Distributed under MIT license.\r
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT\r
+*/\r
+\r
+/* Input and output classes for streaming brotli compression. */\r
+\r
+#ifndef BROTLI_ENC_STREAMS_H_\r
+#define BROTLI_ENC_STREAMS_H_\r
+\r
+#include <stdio.h>\r
+#include <string>\r
+\r
+#include "../common/types.h"\r
+\r
+namespace brotli {\r
+\r
+/* Input interface for the compression routines. */\r
+class BrotliIn {\r
+ public:\r
+  virtual ~BrotliIn(void) {}\r
+\r
+  /* Return a pointer to the next block of input of at most n bytes.\r
+     Return the actual length in *nread.\r
+     At end of data, return NULL. Don't return NULL if there is more data\r
+     to read, even if called with n == 0.\r
+     Read will only be called if some of its bytes are needed. */\r
+  virtual const void* Read(size_t n, size_t* nread) = 0;\r
+};\r
+\r
+/* Output interface for the compression routines. */\r
+class BrotliOut {\r
+ public:\r
+  virtual ~BrotliOut(void) {}\r
+\r
+  /* Write n bytes of data from buf.\r
+     Return true if all written, false otherwise. */\r
+  virtual bool Write(const void *buf, size_t n) = 0;\r
+};\r
+\r
+/* Adapter class to make BrotliIn objects from raw memory. */\r
+class BrotliMemIn : public BrotliIn {\r
+ public:\r
+  BrotliMemIn(const void* buf, size_t len);\r
+\r
+  void Reset(const void* buf, size_t len);\r
+\r
+  /* returns the amount of data consumed */\r
+  size_t position(void) const { return pos_; }\r
+\r
+  const void* Read(size_t n, size_t* OUTPUT);\r
+\r
+ private:\r
+  const void* buf_;  /* start of input buffer */\r
+  size_t len_;  /* length of input */\r
+  size_t pos_;  /* current read position within input */\r
+};\r
+\r
+/* Adapter class to make BrotliOut objects from raw memory. */\r
+class BrotliMemOut : public BrotliOut {\r
+ public:\r
+  BrotliMemOut(void* buf, size_t len);\r
+\r
+  void Reset(void* buf, size_t len);\r
+\r
+  /* returns the amount of data written */\r
+  size_t position(void) const { return pos_; }\r
+\r
+  bool Write(const void* buf, size_t n);\r
+\r
+ private:\r
+  void* buf_;  /* start of output buffer */\r
+  size_t len_;  /* length of output */\r
+  size_t pos_;  /* current write position within output */\r
+};\r
+\r
+/* Adapter class to make BrotliOut objects from a string. */\r
+class BrotliStringOut : public BrotliOut {\r
+ public:\r
+  /* Create a writer that appends its data to buf.\r
+     buf->size() will grow to at most max_size\r
+     buf is expected to be empty when constructing BrotliStringOut. */\r
+  BrotliStringOut(std::string* buf, size_t max_size);\r
+\r
+  void Reset(std::string* buf, size_t max_len);\r
+\r
+  bool Write(const void* buf, size_t n);\r
+\r
+ private:\r
+  std::string* buf_;  /* start of output buffer */\r
+  size_t max_size_;  /* max length of output */\r
+};\r
+\r
+/* Adapter class to make BrotliIn object from a file. */\r
+class BrotliFileIn : public BrotliIn {\r
+ public:\r
+  BrotliFileIn(FILE* f, size_t max_read_size);\r
+  ~BrotliFileIn(void);\r
+\r
+  const void* Read(size_t n, size_t* bytes_read);\r
+\r
+ private:\r
+  FILE* f_;\r
+  char* buf_;\r
+  size_t buf_size_;\r
+};\r
+\r
+/* Adapter class to make BrotliOut object from a file. */\r
+class BrotliFileOut : public BrotliOut {\r
+ public:\r
+  explicit BrotliFileOut(FILE* f);\r
+\r
+  bool Write(const void* buf, size_t n);\r
+ private:\r
+  FILE* f_;\r
+};\r
+\r
+}  /* namespace brotli */\r
+\r
+#endif  /* BROTLI_ENC_STREAMS_H_ */\r